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Reliable Power Amp for Everyday Use

The QSC GX5 amplifier is the middle child in the much-acclaimed QSC GX line. To 8 ohm speakers, it delivers 500 watts of output in a 2-channel speaker system, and 600 watts in a single channel output. To 4 ohm speakers, it delivers 700 watts of output when driving a 2-channel setup, and 850 watts as a single channel output. The QSC GX5 is a true 2-tier Class H amplification system, achieving superior heat gain management and the peerless audio quality that we have come to expect from QSC. At this wattage and size, the QSC GX5 would be best suited to driving the PA in a medium sized club or venue, or for driving multiple onstage monitors.

I/O Designed for Contemporary Applications

The GX Series amplifiers are designed with an I/O intended to be useful for the greatest number of contemporary musicians and DJs. It features a single balanced XLR and 1/4-inch TRS on BOTH channels. It also has RCA phono connectors to hook up with whatever other audio source you may be running through this amp. A 100 Hz LF/HF Crossover switch allows you to toggle to and from Full Range mode.

The GX3 also features a Speakon combo XLR/TRS connector on each channel with 2-pole and 4-pole plugs. There are also positive/negative binding posts here to cover all other speaker wiring configurations.

GuardRail: QSC's Proprietary Heat and Volume Gain Limiter

Every amplifier in the GX Series makes excellent use of its onboard GuardRail system, which combines Clip Limiting and Thermal Limiting into a single active system. QSC intelligently recognized that most power amps are used at the highest possible output at all times, and that clipping derived from heat gain or speaker overdrive should be taken for granted as a problem facing most users.

Its unique design works by measuring the onset of clipping, showing you the peak level via the Clip LED light. It automatically factors the variables of Load Impedance, AC voltage, and power supply and compensates in kind. This way, a milder triggering of the Clip LED does not necessarily trigger the Clip Limiting. Instead, the GX amps target heavy and prolonged clipping, causing a "slow" limiter to gradually reduce the dynamics until the amount of clipping is deemed reasonable. This design aims to do better than other peak limiters by seeking not to eliminate ALL clipping -- but only to intervene as gently as possible on excessive peaks and distortion. This avoids the dramatic and unpleasant "drop out" moments created by other powered speakers that effect substantial gain decreases at the first sign of clipping.

The GX Series also utilizes this feature to compensate for overheating. In such situations, the gain is gradually reduced to prevent the need for thermal muting. Overall, the GX Series does better than other power amps by limiting peak clipping only as much is as absolutely necessary.

The Essence Of Strength and Portability

The QSC GX3 is made of an all-steel case, in a minimum-depth chassis. It will fit in any compact rack mount.

Which Wattage Is Right For You?

Most loudspeaker manufacturers recommend an amplifier with power output equal to the speaker's "Program (Music) Power" rating or two times (2 x) the "Continuous (RMS) Power" rating. The GX5 provides full performance for 500 watt (Program) speakers. Owners of popular 4 ohm loudspeakers (dual-woofer, two-way models and many subwoofers) will find the 700 watt (4 ohm) power of the GX5 an ideal match.

QSC GX5 Technical Notes

The GX5 uses a Class H system, based on key elements of the PLX Series, almost doubling power in the same size and weight. QSC design expertise allows the output devices to shift from low-power to high-power rails in less than a millionth of a second, ensuring that the output power is always right where it needs to be without excess loss. The QSC GX5 uses premium toroidal power transformers for reliable "mid-weight" performance. A variable-speed fan moves air crosswise through the amplifier, drawing cool air in over the power transformer, through the fan, and then over the heat sink. This keeps the transformer cool and allows a full size heat sink to fit in a down-sized chassis. As always, GX5 is fully protected from the usual hazards of the trade, ensuring stable performance and long life.

GuardRail Limiting Protects Your System

GuardRail protection delivers full peak power while preventing detrimental overloads. During excessive clipping, or extreme overheating, GuardRail reduces gain just enough to preserve the integrity of the music, protect the speakers and keep the audience excited, without unprofessional distortion levels or shutdowns.

Subwoofer/Satellite Crossover

A subwoofer reduces strain on the full-range speaker, allowing it to play louder, or letting a smaller speaker do the same job. The GX Series supports this mode with a Crossover switch that splits the full-range input entering Ch 1, sending 20 Hz - 100 Hz to the sub (Ch 1) and 100 Hz - 20 kHz to the top box (Ch 2). The front panel gain controls balance the sub and top box, while GuardRail optimizes peak power into the sub and top individually, for greater musical impact and dynamic range.

zZounds has verified that this customer bought this product from us.
"The Brand QSC, combined with Zzounds, you can't go wrong!!"

Sound:
Wow! The QSC GX5 gives out plenty of staying power. The fans keep it cool, even on the hottest of days. I use this amp with my Peavey DJS4 DJ Speakers. The amps power works really well with these speakers. The sound is clear and very powerful.
Feature:
The QSC comes with light panel on the front. The feature allows you to see if the amp is clipping or not. Very usefull.
Ease of Use:
This amp has a varity of connection, suitable for any novice to use. It is as easy as plug and play. You know how important that is, for any gig.
Quality:
The QSC is very well built. Sturdy, compact and very manageable.
Value:
I would recommened this product to anyone who is looking for a top quality amp at a very reasonable price. Plus, using the 4 payment plan allowed me to buy what I really wanted and not settle for something I could barely afford. Way to Go Zzounds. I will definetly be coming back.
Manufacturer Support:
You get a 6 year warranty, what more can I say. This company really stands by it's product.
The Wow Factor:
The silver and black combination of color is sharp and very sexy. It really stands out.
Overall:
I will hold on to it, unitl it is time to update. I believe this amp will be with me for a good while.

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"Truly the best deal in power amplifiers out there today."

Sound:
In typical QSC fashion, a great sounding amp. Way more amp for the money than I was expecting.
Feature:
Really, it's got everything I need, including a very cool built-in crossover for powering a sub and a top on their own channels. The GuardRail protection system is a no-brainer.
Ease of Use:
Lots of inputs and outputs. Thoughtfully done.
Quality:
It's a QSC. 6 year warranty free online. What else is there to say.
Value:
Yes. I think it's the best deal in amplifiers out there. I'm buying more.
Manufacturer Support:
In all my years of owning QSC products (I'm old) I've only had to contact their tech support once and I was impressed that I got a live body on the phone right away.
Overall:
Really happy with it.

A temporary customer reference number is assigned to each customer only while they are shopping on zZounds.com. If you call our customer service department for assistance, this number makes it easier for us to answer any questions you have about products, services or purchases.

A temporary customer reference number is assigned to each customer only while they are shopping on zZounds.com. If you call our customer service department for assistance, this number makes it easier for us to answer any questions you have about products, services or purchases.

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zZounds has received multiple Bizrate® Circle of Excellence Platinum awards, placing us in the top 0.7 percent of Bizrate‘s network of 5,200 retailers. Our success in meeting the needs of our customers -- since 1996, we‘ve satisfied over 1,000,000 people -- is due in large part to the fact that zZounds only hires experienced musicians to answer your calls and emails, and they are never paid a commission.